A COMPACT HONEY COMB STRUCTURED RECONFIGURABLE ANTENNA WITH CPW FEED FOR MULTIBAND WIRELESS APPLICATIONS

In recent days the design and implementation of reconfigurable antenna in wireless applications plays a tremendous role in minimizing the hardware size of wireless devices. The antenna which has the potential to vary its frequency of operation, radiation pattern and polarization according to the requirement is known as reconfigurable antenna. Here a novel honeycomb structured frequency and pattern reconfigurable monopole antenna has been designed. Honey comb structure gives better bandwidth as it have multiple edges and angles of the hexagon allow for more efficient radiation and reception of electromagnetic waves and it offers symmetric radiation pattern .It is compact sized having higher packing density. A low cost FR-4 substrate with a thickness of 1.5 mm and a compact size of 25×42 mm2 is used in the design. The antenna can be operated in four modes using two PIN diodes. In mode 0 it can resonate at 2.4 GHz which is commonly used for Wi-Fi and Bluetooth communication. While in mode 1it operates at 2.8 GHz and 1.8GHz for mobile communication. In mode 2 it operates at 2.7 GHz as well as 1.8 GHz, and in mode 3, it works at 1.8 GHz and 3.6 GHz for WiMAX communication. This antenna has the peak gain value of 3.99 dBi. Thus by changing the geometry/structure, the antenna performance can be improved. The proposed design is fabricated on FR4 substrate material and the parameters such as return loss (S11) and bandwidth are validated. The simulated results and the measured results match well.